I've started using Wire recently, and while it has some minor warts, call quality has always been excellent. In addition I really love being able to use it on my computer without having to check whether my phone has connectivity or not. I hate having to babysit my phone all the time and Wire is just wonderful for that, kind of brings me back to MSN days.

This chart [1] compares several messaging apps' security standards; I'm not sure how accurate it is but maybe it can help you.

[1]: https://www.securemessagingapps.com/

I thought the best jurisdiction for privacy was Iceland? The solutions provided by your link are all USA/Switzerland/Germany.

Meh, jurisdiction is one thing, but if the trust model does not include the server (a e2e encrypted chat app does not require a trusted server by definition), it doesn't really matter that much. Most they can do is social network analysis (as in, who talks to whom), against which the only solution is using an anonymisation network like Tor (no jurisdiction is going to disallow their intelligence services to see to whom an alleged terrorist is talking).

We use Wire at work. It's sometimes a little buggy, but given the advantages (see my other comment in this thread: https://news.ycombinator.com/item?id=18838010), it's a definite recommendation. Full disclosure: my company is one of the independent auditors of Wire (though they did so before I joined them).